Product Details
Why Digital Servos:
Electronic helicopters are widespread in this era, and more accurate control is needed. Therefore, standard servos with logical chip are no longer suitable. A lot of servos of different volume and weight are available in today’s model market; though they have higher rotational speeds and torque, they don’t have those characteristics of digital servos’:
● Higher resolution
● The tightest dead band
● Accurate positioning
● Faster control response
● Quicker acceleration
● Constant torque throughout the servos travel
● Increased holding power when stationary
High resolution:
Usually, we use PCM1024 receivers in helicopters to reach greater control & precision. However, most 9g-10g servos uses traditional logical chip, which don’t have the resolution of 1024. The dead band of ordinary servos with a logical chip is 8ìs, and it is only 125 if converted into resolution. This is a great waste when investing in a high quality servo. The resolution of the HDX digital servo reaches 2ìs, and if used with HDX’S high precision dual conversion receiver, the resolution of the output signal reaches 1024, which becomes a true high resolution system.
Increased Holding Power When Stationary:
Though traditional servos with a logical chip have higher rotational speeds and torque, they all have a common weakness - they don’t have high holding power when stationary. The flight state of the helicopter is guaranteed by the accurate positioning of the servo, and if the servo doesn’t have a high holding power, the flight state of the helicopter will change easily. This is bad for 3D aerobatic flight.
The holding power of the digital servo stems from its high-accuracy MCU, and it has higher PWM frequency when compared with the logic chip servo. The digital servo inputs more power to the electromotor to ensure the servo to keep positioning. Then, the change of the flight posture caused by environment factors will reduce.
The HDX digital servo also possesses higher speed of 0.09s/60° and higher torque of 2kg.cm. This servo is suitable for the GY401, and is compatible with this Futaba system. Even if the gyro sensitivity is up to 100%, the tail of the helicopter will not shake. With micro helicopters, such as the Align Trex 450, the servo matching with the GY401 seems to be too heavy - HDX’S 9g grade servo is the most suitable. In order to best suit micro helicopters, the HDX 9g digital servo is the best choice at hand.
DS-928BB Specifications
|
|
|
| Operating temperature range |
-20℃ to +60℃ |
| Operating speed |
0.12sec/60° |
| Stall torque |
1.8kg.cm |
| Standing torque |
1.8kg.cm hold out @ 5° |
| Running current |
200mA/60° no load |
| FDead band width |
≤3usec |
| Operating travel |
40°/one side pulse traveling 400usec |
| Motor type |
cored metal brush |
| Potentiometer type |
2 slider/direct drive |
| Dimensions |
22.5x11.5x24.6mm(0.89x0.45x0.97)" |
| Weight |
9g(.32oz) |
| Ball bearing |
MR85 |
| Gear material |
heavy duty resin |
| Connector wire length |
215mm(8.46in) |
Feature:
|
- High efficiency MCU+MOSFET
- High rotational speed and torque
- 3 graded core metal motor
Applications:
|
- Micro Electronic Helicopters
- Gyroscope hold servo
- Fast park flying plane
- Electronic microplane
- Glider
- MAV 1/18 scale RC cars
|
|
